(Probabilities
shown with decimal dropped-at an observance x occurring this or fewer
times in a series of N.)

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

5

031

188

500

812

969

6

016

109

344

656

891

984

7

008

062

227

500

773

938

992

8

004

035

145

363

637

855

965

996

9

002

020

090

254

500

746

910

980

998

10

001

011

055

172

377

623

828

945

989

999

11

006

033

113

274

500

726

887

967

994

12

003

019

073

194

387

613

806

927

981

997

13

002

011

046

133

291

500

709

867

954

989

998

14

001

006

029

090

212

395

605

788

910

971

994

999

15

004

018

059

151

304

500

696

849

941

982

996

16

002

011

038

105

227

402

598

773

895

962

989

998

17

001

006

025

072

166

315

500

685

834

928

975

994

999

18

001

004

015

048

119

240

407

593

760

881

952

985

996

999

19

002

010

032

084

180

324

500

676

820

916

968

990

998

20

001

006

021

058

132

252

412

588

748

868

942

979

994

21

001

004

013

039

095

192

332

500

668

808

905

963

987

22

002

008

026

067

143

262

416

584

738

967

933

974

23

001

005

017

047

105

202

339

500

661

798

895

953

24

001

003

011

032

076

154

271

419

581

729

946

924

25

002

007

022

054

115

212

345

500

655

788

885

The ERI Distance Learning Center is registered with the National Association of State Boards of Accountancy (NASBA) as a sponsor of continuing professional education on the National Registry of CPE Sponsors. State boards of accountancy have final authority on the acceptance of individual courses for CPE credit. Complaints regarding registered sponsors may be submitted to the National Registry of CPE Sponsors through its website: www.learningmarket.org.